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| Variables | Preoperative | Postoperative | P value |
|---|---|---|---|
| Air-conduction hearing threshold (dB HL) | 65.29±21.53 | 49.06±22.15 | 0.038 |
| Air-bone gap (dB HL) | 32.53±8.21 | 19.94±10.00 | 0.00034 |
Data are expressed as mean ± SD. SD, standard deviation; dB HL, dB hearing level.
